Learn children to be a producer of content and not only a consumer on a tablet
A tablet is not only for onsuming what other people have done. You can too. Also a kid can.
Bloxels
Create your own side scroller.
There is also hardware if you want.
http://www.bloxelsbuilder.com/
Coda game
I have not tested
http://filimundus.com/coda-game/
Daisy the dinosaur
There is not a clear goal, just fiddle around. For good and bad. It is like making movies in ScratchJr but only side scrolling and less effects.
http://daisythedinosaur.com/
The Foos
It is like Lightbot but side scrolling and with funnier characters. The goal is somewhat funnier compared to lightbot; getting a donut for a (US) police officer instead of just lighting a light bulb. To try it out there is an older? version on the web.
http://thefoos.com/play/
Hopscotch
Like Scratch.
https://www.gethopscotch.com/
Hour of code
Lots of stuff.
https://code.org/
Lego Minecraft
Hard to use computer interface.
Expensive.
Light bot
Make a little robot find her way around stairs and obstacles.
https://lightbot.com
Light bot looking but with famous figures like angry birds
https://studio.code.org/hoc/1
Minecraft (pocket edition)
https://minecraft.net/pocket
Scratch(Jr)
Unlogical user interface.
https://scratch.mit.edu/
Also see https://www.dexterindustries.com/BrickPi/program-it/scratch/ for using Scratch with Raspberrypi.
More mechanical than programming
Pettson and Findus
http://filimundus.com/pettsons-inventions/
http://filimundus.com/pettsons-inventions-2/
https://filimundus.com/pettsons-inventions-3/
Inventioneers
http://filimundus.com/inventioneers/
I have not tested
Cargo-bot
https://itunes.apple.com/us/app/cargo-bot/id519690804
Tynker
I have not tested.
https://www.tynker.com/
Move the turtle
itunes.apple.com/us/app/move-turtle.-programming-for/id509013878?mt=8
On a proper computer
Blockly
https://blockly-games.appspot.com/?lang=en
Bloxels verkar ju apkul.
Som när jag satt med Shoot’em Up CK på C64 1985! :D
/Jim